There appears to be a regression in (alpha) parted-2.0 since parted-1.9.0.
Specifically something has changed that causes a warning message to be
displayed when a new partition is created and at least one partition on
the device is mounted. The warning messaged displayed is:
Warning: The kernel was unable to re-read the partition table
on /dev/sdd (Device or resource busy). This means Linux
won't know anything about the modifications you made until
you reboot. You should reboot your computer before doing
anything with /dev/sdd.
This change occurs with (alpha) parted-2.0 that was downloaded from:
ftp://alpha.gnu.org/gnu/parted/parted-2.0.tar.gz
This behaviour did not exist in parted-1.9.0 or prior versions to my
knowledge.
This change in behaviour is also evident when using GParted with the
(alpha) parted-2.0 library libparted. When GParted is started, after
scanning devices it will show a dialog indicating that the kernel is
unable to re-read the partition table on a list of devices that have at
least one partition mounted. This leads me to believe that the problem
originates in a subroutine prior to ever calling parted's mkpart
command. Perhaps when the _PedDevice structure is set up from a
ped_device_get() call? It's just a hunch of mine - I haven't done any
testing to verify this as a source of the change.
Following are a series of steps that demonstrate this problem:
--> $ dev=/dev/sdd
--> $ parted -s $dev mklabel msdos
--> $ parted -s $dev mkpart primary ext2 1 10
--> $ parted -s $dev print
Model: ATA ST3160022ACE (scsi)
Disk /dev/sdd: 160GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Number Start End Size Type File system Flags
1 32.3kB 10.0MB 9968kB primary ext2
--> $ mkfs.ext2 ${dev}1
mke2fs 1.40.8 (13-Mar-2008)
Filesystem label=
OS type: Linux
Block size=1024 (log=0)
Fragment size=1024 (log=0)
2448 inodes, 9732 blocks
486 blocks (4.99%) reserved for the super user
First data block=1
Maximum filesystem blocks=10223616
2 block groups
8192 blocks per group, 8192 fragments per group
1224 inodes per group
Superblock backups stored on blocks:
8193
Writing inode tables: done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 34 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
--> $ mkdir /mnt/testmnt
--> $ mount ${dev}1 /mnt/testmnt
##### NOTE: A warning message occurs if a partition is mounted.
--> $ parted -s $dev mkpart primary ext2 11 20
Warning: The kernel was unable to re-read the partition table on
/dev/sdd (Device or resource busy). This means Linux won't know
anything about the modifications you made until you reboot. You
should reboot your computer before doing anything with /dev/sdd.
--> $ parted -s $dev print
Model: ATA ST3160022ACE (scsi)
Disk /dev/sdd: 160GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Number Start End Size Type File system Flags
1 32.3kB 10.0MB 9968kB primary ext2
2 10.0MB 20.0MB 10000kB primary
--> $ umount /mnt/testmnt/
##### NOTE: No warning message occurs if all partitions are unmounted
--> $ parted -s $dev mkpart primary ext2 21 30
--> $ parted -s $dev print
Model: ATA ST3160022ACE (scsi)
Disk /dev/sdd: 160GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Number Start End Size Type File system Flags
1 32.3kB 10.0MB 9968kB primary ext2
2 10.0MB 20.0MB 10000kB primary
3 20.0MB 30.0MB 10000kB primary
--> $
Regards,
Curtis Gedak
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